Mechanism



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HALVORSEN.

CLOCK STRIKING MECHANISM.

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CLOCK YSTRIKING MECHANISM. No. 377,558. Patented Feb. 7, 1888.

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L. HAL VORSEN. CLOCK STRIKING MECHANISM.

No. 377.558. Patented Feb. 7, 1888.

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PATENT OFFICE.

LARS HALVORSEN, OF LAURVIG,

NORWAY, ASSIGNOR TO HALVOR HALVORSEN, OF PARIS, FRANCE.

CLOCK STRIKING MECHANISM.

SPECIFICATION forming part; of Letters Patent No. 377,558, dated'Febi-uary 7, 1888.

Application filed May 11, 1887. Serial No. 238,006. (No model.) Patented in Belgium April 30, 1887, No. 77,018; in Italy May 17, 1887, No. 21,528/376, and in Spain June .27, 1887, No. 11,000.

To aZZ whom it may concern.-

Be it known that I, Lass HALVORSEN, a subject of the King of Norway, residing at Laurvig, Norway, have invented certain new and useful Improvements in Clocks, (which have heretofore been patented to me by the Governments of Belgium, dated April 30, 1887, No. 77,018; Spain, dated June 27, 1887, No. 11,060, and Italy, dated May, 17,1887, No. 21,528/ 376,) of which the following is a description.

This invention relates to a new and improved striking mechanism for clocks of all kinds, and the object of my invention is to provide a new and improved striking mechanism which is operated from the same mechanism that is used for moving the hands, and which striking mechanism is of such construction that when it gets out of order it does not affect the mechanism for moving the hands.

The invention consists, mainly, in the combination, with any suitable clock mechanism, of a stepped spiral disk, swinging toothed and weighted lever which is raised at suitable intervals by the usual clock mechanism, and a hammer operated by suitable devices from said weighted lever.

The invention also consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter.

In the accompanying drawings, Figure 1 is a front view of a clock provided with my improved striking mechanism, the dial-plate and bridges being omitted, and the parts of the clock and striking mechanism being in the position they have immediately after twelve oclock. Fig. 2 is a similar view showing the parts in the position they have just before one oclock. Figs. 3 and 4 are side views from the opposite sides of the clock mechanism, parts being broken out. Fig.' 5 is a top view of the clock.

Similar letters of reference indicate corresponding parts.

The spindle c is journaled in the frame in the usual manner, and directly in front of the front plate of said frame the toothed wheel 6 is rigidly mounted on it. In front of the bridge 9, fastened on the front plate, d, the

sleeve h is loosely mounted on the spindle c, said sleeve h carrying the toothed wheel h, and also the eccentric stepped wheel p, which is known as the snail-wheel. The gearwheel 6, which is provided with the pin f, which will be described hereinafter, engages with the gear-wheel Z, mounted loosely on a spindle, which is journaled in the bridgei and front plate, d, and with said gear-wheel Z are united the pinion k, engaged with the wheel h, and the wheel m, which is provided with a series of pins, in this case twelve; but, as shown in Fig. 2, said pins of the wheel m are so arranged as to form a segmental break or recess in the circular row of pins. The lever q is pivoted at q to swing up and down, and on its swinging end, which is curved downward, are formed the toothed segmental racks a n, the teeth of the former being adapted to engage the pins on the wheel m, whereas the teeth of the upper rack, n, are adapted to engage the teeth of the pinion a, mounted loosely on a pivot, t, on which is also mounted a toothed cam-wheel, 0, provided with a pawl, w, kept in engagement with the teeth of the pinion u by a spring, to, acting on said pawl. The hammer-leverz is pivoted at r, and is provided with two pins, z Z2, at the opposite sides of the pivot 3 upon which pins 2 z the teeth of the wheel 21 can act. The hammer-lever z is provided with a downweirdly-curved arm, 2, carrying at its lower end the counterbalancing-weight d.

To the upwardly-projecting part 2 of the hammer-lever z is fastened a straight spring, a, which carries at its upper end the hammer a adapted to strike the spiral spring 0 or a bell or gong on the sounding-board b. To the lever q is fastened a curved wire, r, to the upper free end of which the weight sis attached. A red or bar, 00, fastened to the lever q, projects downward toward the snail-wheelp. On the rear edge of the downwardlyprojecting part of the lever q the curved edge at is formed, at the lower end of which the shoulder n is formed. A lever, M, is mounted at one end on the pivot E, and is acted upon by a spring, H, fastened to said lever M and to a fixed pin, G, on the frame (1, whereby by the action of said spring H on said lever the upper end of the lever is pressed against the pin f on the wheel 6 and against a pin, D, projecting from the front plate, d. 'The other parts of the clock need not be described, as they are of the usual construction.

The operation is as follows: The minutehand is fixed on the outer end of the spindle c and the hour-hand is in the sleeve or hub h of the wheel h, the minute-hand making one revolution every hour, as does also the wheel Z. The wheel h, having twelve times the diameter of the pinion 70, makes only one-twelfth of a revolution per hour. Just before striking one the parts are in the position shown in Fig. 2. At one oclock the pin f on the wheel 6, which revolves in the direction of its arrow, strikes against-the lever M and removes the upper end of the same from the shoulder a of the downwardly-projecting arm of the lever q, thus permitting said lever to descend under the action of the weights. The teeth of the upper segmental rack, 11,, engage the pinion a and revolve the same and the cam-wheel c in the direction of the arrow on said cam-wheel,

Figs. 1 and 2. At one oelock the snail-wheel p is in the position shown in Fig. 2, and after the pinion a has been revolved the distance of one tooth the lower end of the arm of the lever strikes on the rim of the snail-wheel at the highest part of the same-that is, the part having the greatest radiusand thus the descent of the lever q is checked and the hammer is operated only once-that is, the clock strikes one. The pinion on the wheel at engages the teeth of thelower rack, a, thereby raising said rack and the lever q, carrying the weight 8. By this time the pinfhas passed the lever M, and the end of the said lever is pressed by the spring H against the bevel a of the down weirdly-projecting ,part of the lever g, and when said lever q is raised sufficiently the end of the lever snaps against the shoulder at, keeping the lever q in raised position. At the next hour the lever M is again shifted, permitting the lever q to drop until its arm w again strikes on the rim of the snail-wheel p; but as that part of the rim of the snail-wheel on which the arm 00 now strikes has less diameter than the next preceding part the lever q can descend farther, the hammeris vibrated twice, and the clock strikes two, and so on.

It will be observed that the pinion m is provided with a blank space or recess, which is necessary to permit the rack a to swing downward under the action of the weights without engaging the pins of the wheel.

It is evident that when the clock strikes six, more pins of the wheel at will engage with the teeth of the rack it than when the clock has only struck one. The weight d on the lower curved arm of the hammer-lever balances said lever and hammer. The action of the hammer-lever is shown in Figs. 1 and 2. When the cam is in the position shown in Fig. 2, one of the teeth of the cam-wheel a, which is rotated in the direction of the arrow, Figs. 1 and 2, acts on the left of one pin, t", of the hammer and springs, and thereby the hammer-head is swung to the right and the weight to the left into the position shown in Fig. l. IVhen said tooth slides off the pin 2', the hammer is released, and under the action of the weight d the head is swung to the left and strikes the gong, the weights swinging to the right. This action is repeated for each tooth.

Having thus described my invention, I claim as new and desire to secure by Letters Patcut- 1. In a clock, the combination, with the usual clock mechanism, of a pivoted weighted lever provided with a segmental rack, a pinion engaging with said rack and operated from the clock mechanism, a hammer, and intermediate mechanism operating said hammer by the pivoted weighted lever, substantially as shown and described.

2. In a clock, the combination, with the usual clock mechanism, of a pivoted weighted lever having a rack, n, a pinion engaged with said rack, a toothed or cam wheel operated by a ratchet and pawl from said pinion, a pivoted hammer actuated by said toothed or cam wheel, and mechanism forlifting the weighted pivoted lever by means of the clock mechanism, substantially as shown and described.

3. In a clock, the combination, with the usual clock mechanism, of a pivoted weighted lever having a downwardly-preyecting part providedwith an upper and lower segment rack, a wheel operated by the clock mechanism aud engaging the lower rack, a pinion engaged with the upper rack, a toothed or cam wheel operated by said pinion, and a hammer operated by the toothed or cam wheel, substantially as shown and described.

4. In a clock, the combination, with the usual clock mechanism, of the lever q, having the racks n a, mechanism for operating the hammer from the upper rack, 11, gearing for driving awheel which engages with the lower rack, the snail-wheel p, and the stop-arm or on the lever q, substantially as shown and described.

5. In a clock, the combination, with the usual clock mechanism, of a pivoted weighted lever having a segmental rack, 12, the wheel m, provided with a gap or recess inits rim, which wheel on is adapted to engage with the rack 11, mechanism for driving the wheel at from the clock mechanism, and mechanism for operating the hammer from said pivoted lever, substantially as shown and described.

6. In a clock, the combination, with a pivoted weighted lever having a shoulder, a, of the spring-pressed lever M, the wheel a, provided with the pin f, the pin D on the face of the casing, mechanism for raising the lever q by means of the clock mechanism, and mechanism for operating the hammer from said lever, substantially as shown and described.

LABS HALVORSEN.

\Vi tn esses:

L. A. TANGEVALS, GERH. GADE.

ICO 

